IOCAS-IR  > 海洋环流与波动重点实验室
Subthermocline anticyclonic gyre east of Mindanao and its relationship with the Mindanao Undercurrent
Song Lina1,2; Li Yuanlong1,3; Liu Chuanyu1,4; Wang Fan1,4
2017-11-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume35Issue:6Pages:1303-1318
SubtypeArticle
AbstractThe quasi-permanent anticyclonic gyre (ACG) east of Mindanao is a dominant feature of the subthermocline circulation in the southern Philippine Sea, and it is believed closely associated with the continuous northward alongshore flow of the Mindanao Undercurrent (MUC). In this study, the structure and variability of this ACG were investigated using the 1950-2012 output of the Oceanic General Circulation Model for the Earth Simulator (OFES), which can reproduce well the structure of the climatological intermediate-layer circulation and satellite-observed sea level variations in the southern Philippine Sea. Between 26.8-27.3 sigma(theta) , the ACG covers a large area from the Mindanao coast to 131 degrees E and from 3 degrees N to 10 degrees N. Its anticyclonic flow structure is unrelated to the surface Halmahera Eddy. The eddy-resolving simulation of the OFES revealed that the ACG consists of two components. The southern ACG (SACG) is centered at similar to 6 degrees N, while the northern ACG (NACG) is centered at similar to 10A degrees N. Seasonal and interannual variations of the ACG are linked to the variations of the northward MUC transport along the Mindanao coast, and the role of the SACG is more important than the NACG. Stronger (weaker) ACGs lead to greater (smaller) MUC transport. On the interannual timescale, the SACG shows a spectrum peak at 4-8 years, while the NACG has enhanced power within the 3-5-year band. A lead-lag correlation analysis indicates that interannual variations of the ACGs and the MUC transport are partly associated with the El Nio-Southern Oscillation. Possible causes for the ACG variability are discussed.
KeywordSubthermocline Circulation Anticyclonic Gyre Mindanao Undercurrent Seasonal And Interannual Variability Halmahera Eddy
DOI10.1007/s00343-017-6111-8
Indexed BySCI
Language英语
WOS IDWOS:000415810900004
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143279
Collection海洋环流与波动重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves KLOCAW, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA
4.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao 266000, Peoples R China
First Author Affilication中国科学院海洋研究所
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Song Lina,Li Yuanlong,Liu Chuanyu,et al. Subthermocline anticyclonic gyre east of Mindanao and its relationship with the Mindanao Undercurrent[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2017,35(6):1303-1318.
APA Song Lina,Li Yuanlong,Liu Chuanyu,&Wang Fan.(2017).Subthermocline anticyclonic gyre east of Mindanao and its relationship with the Mindanao Undercurrent.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,35(6),1303-1318.
MLA Song Lina,et al."Subthermocline anticyclonic gyre east of Mindanao and its relationship with the Mindanao Undercurrent".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 35.6(2017):1303-1318.
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